Hirvijärvi Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Hirvijärvi Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Hirvijärvi Reservoir today is 18.2°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| AUG 11 | 18.4°C | 20.0°C | |
| AUG 12 | 17.9°C | 20.0°C | |
| AUG 13 | 17.8°C | 20.0°C | |
| AUG 14 | 17.8°C | 20.0°C | |
| AUG 15 | 17.7°C | 20.0°C | |
| AUG 16 | 17.8°C | 20.0°C | |
| AUG 17 | 18.1°C | 20.0°C | |
| AUG 18 | 18.1°C | 20.0°C | |
| AUG 19 | 20.0°C | 18.3°C | |
| AUG 20 | 20.0°C | 18.4°C | |
| AUG 21 | 20.0°C | 18.5°C | |
| AUG 22 | 20.0°C | 18.6°C | |
| AUG 23 | 20.0°C | 18.7°C | |
| AUG 24 | 20.0°C | 18.7°C | |
| AUG 25 | 20.0°C | 18.8°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 0°C | 2°C | 5°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 2°C | 5°C |
| April | 0°C | 3°C | 6°C |
| May | 5°C | 12°C | 18°C |
| June | 11°C | 17°C | 22°C |
| July | 14°C | 20°C | 25°C |
| August | 14°C | 20°C | 25°C |
| September | 10°C | 15°C | 21°C |
| October | 4°C | 8°C | 11°C |
| November | 2°C | 6°C | 9°C |
| December | 0°C | 2°C | 5°C |
Hirvijärvi Reservoir: Water Temperature by Location
Hirvijärvi Reservoir: Weather Forecast
August 19
August 20
August 21
August 22
August 23
August 24
Location & Local Information
Hirvijärvi Reservoir, located in South Ostrobothnia in western Finland, is an artificial lake created to regulate water levels and prevent flooding in the surrounding region. It is part of the Lapuanjoki river basin and is surrounded by forests and open countryside. The reservoir’s water temperature follows the general pattern typical of Finnish inland waters. After the ice melts in late April or early May, the surface temperature is around 4–7 °C (39–45 °F). In early summer, it rises gradually to 13–16 °C (55–61 °F), and in July, the warmest month, Hirvijärvi Reservoir usually reaches 18–22 °C (64–72 °F). Shallow sections can occasionally exceed 23 °C (73 °F) on sunny, calm days. By late September, the temperature falls below 10 °C (50 °F), and freezing begins again in November.
Swimming in Hirvijärvi Reservoir is allowed and popular during summer. The water is relatively clean and safe for bathing, especially near the designated swimming areas. The lake’s peaceful setting and easy access to the water make it suitable for both recreation and relaxation. While spring and autumn bring cooler temperatures, summer offers comfortable conditions for swimming and other water-based activities in a calm and natural environment.